Oil and coal-dust furnace attachment



C. D. MOSHER. OIL AND COAL DUST FURNACE ATTACHMENT.

APPLICATION FILED OCT- 25-1919- 1,4:33,903. Patented Oct. 31, 1922.

3 SHEETSSHEET' 2- INVENTOR Charles E Mosker ATTORNEY C. D. MOSHER. OILAND COAL DUST FURNACE ATTACHMENT.

APPLICATION FILED OCT 25, 1919' 1,433,903. Patented Oct. 31, 1922 3SHEETSSHEET 2.

INVENTOR Charles 17. Mosfier ATTORNEY c. u. MOSHER. OIL AND COAL DUSTFURNACE ATTACHMENT.

APPHCATION FILED OCT. 25. 1919. 1,43 3,903. I Patented Oct. 31, 1922.

INVENTOR Charles 17. Masher TTORNEY atented Oct. 31, 1922.

UNITED STATES CHARLES D. KOSHER, OF NEW YORK, N. Y.

OIL AND COAL-DUST FURNACE ATTACHMENT.

Application filed October 25, 1919. Serial No. 333,884.

To all whom it may concern:

Be it known that I, CHARLES D. Mosnnn. a citizen of the United States,residin at New York Cit in the county of New ork and State of ew York,have invented certain new and useful Improvements in Oil and Coal-DustFurnace Attachments, of which the following isa specification, referencebeing had therein to the accompanying drawing.

My new invention relates to improvements in furnaces for burning coaldust or a mixture of coal dust and fuel oil tar or other similar fueland more partcularly has reference to and is illustrated in theaccompanying drawings in its application to a steam generating plant butmay be-applied to metallurgical or other furnaces.

Referrin to said drawings, 1 have illustrated in ig. l in side elevationpartly in section a suitable form of steam plant emmodying anapplication of my invention. Fig. 2 is a front elevation of the sameshowing only art of the perforations in the damper. ig. 3 is across-section looking 7 down upon the line 3-3 of Fig. 1. Fig. 4

is an enlarged section of the furnace on the line 4-4 of Fig. 1 lookingtowards the front. Fig. 5 is a view lookmg down upon the line 55 of Fig.2; and Fig. 6 is a view looking from right to left at the damper 27shown in Fig. 1, parts and some of the per-.

forations being omitted.

Referring now more particularly to Fig. 1; 5-6 indicate the back andfront walls respectively of the steam plant provided with the usualdrums 7-8 at the top and bottom connected by the tubes 9 separated bythe bame wall 10. 11 indicates coal dust pockets or hoppers containingthe fuel to be burned which fuel may be fed in afan shaped stream by ajet of high pressure air, and 12 indicates a suitable motor upon abracket 13 for driving the Worm feed 14 by suitable chains such as 16. r17 indicates a suitable outlet or flattened nozzle for the coal dust fedby the worm 1t and is penetrated by the air supply tube 18 centrallymounted therein and the air being supplied thereto under pressuredischarges the dust as indicated by the fan shaped stream 19 against therear of the fire brick perforated structure 20.

21 indicates a blower provided with an out let 22 which supplies air tothe rectangular channel 23 surrounding the )it 24 into which anynoncombustible material such as ash and clinker are rojected out of thecombustion zone and eposited upon the bottom 25 which may be dumped asre uired by operatmg; the lever 25'.- The brie walls forming the channelsurrounding the pit and combus tion chamber becomes highly heated andthus the air in the rectangular passage 23 is thoroughly heated bycontact with the brick walls before entering the chamber 26 where itrises behind and passes through the perforations 27' in the dampers 27which regis ter with the perforations in the late 40 which in turnregister with the per orations in the brick. When the dampers are openthe air passes through the perforated brick hearth 20 in numerous smalljets which, are projected directly up against the down wardly pouringblast of air and fuel dust which thereupon becomes ignited, as theperforated brick hearth becomes heated to incandescence which alsofurther heats the air in passing through the many small channels orperforations. With a proper adjustment of the dampers the air jets andblast of fuel on meeting oppose each other and are practically broughtto a state of rest so that the gases of combustion may pass ofi'practically at right angles to their original direction across thefurnace 28 among the boiler tubes 9 from where they rise between thetubes and over the top of the baffle wall 10 and downwardly finallyescaping through the flue 29. The ash slag or other noncombustibles thatare projected downwardly with the fuel on account of their greaterweight than the gases of combustion continue by their greater momentumdownwardly and are deposited into the pit from where they are dumped asthey accumulate from time to time as required. The air in passing aroundthe channel in the furnace walls surrounding the pit absorbs the heatfrom the hot slag deposited there and cools it from its plastic form toa caked substance in which condition it can be easily dumped as requiredby operating the lever 25 controlling the dumping bottom 25.

The dampers 27 are attached by arms 30 .to the shaft 30' which iscarried on the bearings 30" secured to the front of furnace. A gearedquadrant 31 meshing with the worm 31 is also connected to the shaft 30?enabling the dampers 27 to be regulated by turning the crank 31"connected to the worm 31'. the holes 27 in the damper 27 registeringwith the holes in the plate -10 supporting the perforated hearth 20.Suitable counterweights such as 32 are connected by arms 33 on theopposite side of the shaft 30 thereby balancing the weight of thedampers 27 and enabling them to be easily adjusted.

Peep-holes such as 34 are provided for observing the action of thecombustible 1n the furnace chamber 28.

Of course it will be understood that various modifications will be madein the construction and arrangement .of parts without departing from thespirit of the invention as claimed.

I claim: 7

1. In a furnace of the class described, an inlet for fuel a fire brickstructure having perforations for admitting air in opposition to thefuel discharged from said inlet, and dampers immediately adjacentthereto for varying the area of said perforations.

2. In a furnace of the class described, an inlet for fuel a fire brickstructure having perforations for admitting air in opposition to thefuel discharged from said inlet, and dampers immediately adjacentthereto for varying the area of said perforations, said perforationsextending inwardly and upwardly. a 1

3. In a furnace of the class described, an inlet for fuel a fire brickstructure having perforations for admitting air in opposition to thefuel discharged from said inlet, and dampers immediately adjacentthereto for varying the area of said perforations, said perforationsextending inwardly and upwardly, said fire brick structure at an angleto the vertical of said furnace.

4. In a furnace of the class described, an inlet for fuel a' fire brickstructure having perforations fOI' jQdIIIiitlng air in opposition tosaid fuel therefor and dampers immediately adjacent thereto for varyingthe area of said perforations, said perforations extending inwardly andupwardly, said fire brick structure at an angle to the vertical of saidfurnace, and in combination therewith means below for accumulating theunburnt products and for absorbing the heat therefrom.

5. In a furnace of the class described, a tire brick structure at thefront having perforations through which air is adapted to enter thefurnace, means for discharging fuel across the inner surface of saidstructure and dampers adjacent the outside of said structure for varyingthe area of said perforations.

(3. In a furnace of the class descrbed, a fire brick structure at thefront having perforations adapted to discharge air inward and upwardinto the furnace, means for dis charging fuel downward across the innersurface of said structure in opposition to the air entering through saidperforations and dampers adjacent the outside of said structure forvarying the area of said perforations.

In testimony whereof I hereunto afiix my signature.

-.CHARLES D. MOSHER.

